test_paint.java~40~

主要为一个空间信息管理系统

package edu.whu.poly;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

import java.awt.*;
import java.awt.geom.*;

public class test_paint
    extends Frame
{
  polyStruct[] poly1;
  polyStruct poly2;
  public static void main(String args[])
  {
    //new test_paint();
  }

  public test_paint(polyStruct[] poly,polyStruct tpoly)
  {
    poly1=poly;
    poly2=tpoly;
    setSize(220, 180);
    setVisible(true);
  }

  public void paint(Graphics g)
  {

    // Obtain a Graphics2D object
    Graphics2D g2 = (Graphics2D) g;

    // Set the rendering quality.
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);

    // define a linear colour gradient

    for (int k = 0; k < poly1.length; k++)
    {
      //GradientPaint gp = new GradientPaint(0, 2+k*100, Color.red,
       //                                    0, 2+k*100, Color.yellow);
       Color co=new Color(0,0,255);
       g2.setPaint(co);

      //System.out.println(poly1[k].getX().length);
      for (int i = 0; i < poly1[k].getX().length-1; i++)
      {
        //System.out.println("point="+poly1[k].getX()[i]+" "+poly1[k].getY()[i]+" "+poly1[k].getX()[i + 1]+" "+poly1[k].getY()[i + 1]);
        g2.drawLine(poly1[k].getX()[i], poly1[k].getY()[i], poly1[k].getX()[i + 1], poly1[k].getY()[i + 1]);
      }
      g2.drawLine(poly1[k].getX()[poly1[k].getX().length-1], poly1[k].getY()[poly1[k].getX().length-1], poly1[k].getX()[0], poly1[k].getY()[0]);
    }
    Color co=new Color(255,0,0);
    g2.setPaint(co);
    for(int l=0;l<poly2.getX().length-1;l++)
    {
      g2.drawLine(poly1[k].getX()[poly1[k].getX().length-1], poly1[k].getY()[poly1[k].getX().length-1], poly1[k].getX()[0], poly1[k].getY()[0]);
    }
    //g2.transform(AffineTransform.getRotateInstance(Math.PI / 8));
    //g2.setPaint(Color.blue);
    //g2.setComposite(AlphaComposite.getInstance(
      //  AlphaComposite.SRC_OVER, 0.5f));

  }
}